This quiz is designed to assess your basic knowledge in 'Molecular Genetics'. Choose the best answer from the four options given. When you've finished answering as many of the questions as you can, scroll down to the bottom of the page and check your answers by clicking ' Score'. Percentage score will be displayed along with right answers.

1. Which of the bonding examples below is NOT possible?
a DNA adenine to an RNA thymine
a DNA guanine to an RNA cytosine
a DNA adenine to an RNA uracil
a DNA adenine to a DNA thymine
a DNA guanine to a DNA cytosine2. For the DNA strand 5ACCGTGACATTG3, the correct compliment DNA would be
5TGGCACTGTAAC3
3UGGCAGUGUAAC5
5ACCGUGACAUUG3
3TCCGAGTGTAAC5
3TGGCACTGTAAC53. The portion of the DNA molecule that can vary is its
deoxyribose
base
deoxyribose
phosphate
all of these4. Which of the following replaces guanine in RNA?
adenine
uracil
thymine
cytosine
none of the these5. An mRNA is 429 nucleotides long. The number of amino acids in
the polypeptide chain formed from this mRNA is
141
142
143
144
1456. Which of the following statements is true about mutations?
generally lethal
Rates tend to be very high in most populations.
irreversible
source of genetic variation
Only certain gene locations are affected.
7. In the illustration below, the strand with an (*) is the

Okazaki fragment.
template
promoter
leading strand
lagging strand8. Darwin’s Natural Selection includes all of the following EXCEPT
Organisms produce more offspring than can survive
Variation can be due to mutations
Some organisms will be more fit to survive than other
Not all organisms may survive, due to competition
The difference in survivability between organisms may be due to variation
9. Which of the following is a semi-conservative process?
crossing over
transcription
translation
non-disjunction
DNA replication
10. Which of the following is NOT consistent with Griffith’s experiments?
injected S-strain: mouse dies
injected R-strain: mouse lives
injected heat-killed S-strain: mouse lives
injected mixture of heat-killed S-strain and live R-strain: mouse lives
injected mixture of R-strain and live S-strain: mouse dies
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